Hearth for roasting ores.



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HEABTH FUR BOASTING QR'ES.

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No 660.982- Patentad Oct. 30,` |900. /f

G. -CLARY &. G. W. GARRISN.

HEARTI'IAFUR ROASTING GRES. (Application led Feb. 5, 1900.)

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No. 660,932. Patented 00L 30, 1900. E. CLARY 8. G. W. GARRISM.

I'IEARTH FUR B'OASTING DRES. (Application 'med Fab. 5. 1900.)

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itu/uf Wanssum @www iiNirEn STATES GEORGE OLARY, OF ZACATECAS, MEXICO, AND GEORGE w.

GOLDEIELD,

PATENT FErCE.

eARRisON, OE COLORADO. i

HEARTH FOR RoAsri-ne leales.v

SPECIFICATION forming' part of Letters Patent No. 660,982, dated October .30, 1900.

' Application filed February 6, 190()4 serial No. 4,109.v LNG model.)

To MZ whom it mag/ concern V Be it known that we, GEORGE CLARY, of the city of Zacatecas, Republic of Mexico, and GEORG-E W. GARRISON, of the city of Goldield,Teller county, State of Colorado, have invented certain new and useful Improvements in Hearths for Roasting Ores, of which the following is a full, clear, and exact descrip tion, reference being, had to the accompanyio ingr drawings, forming a parthereof.

This invention relates to hearths for roasting ore; and it consists of the novel construction, combination, and arrangement of parts hereinafter shown, described, and claimed. i5 The object oi' this invention is toconstruet a device fOr-roasting;r Ore and provide a inea-ns for reciprocatingV the same, wherebyi-he ore is uansed to roll over a'certain spaoeduring the process of roasting.

ze Figure lis a side elevation of our improved hearthl for roasting ore. Fig. 2 is a top plan View. Fig. 3 isa detail sectional view. Fig. 11 is a view showing the means by which the device is reciprocated.

z5 the cams which we make use of in carrying out our invention. Fig. (i shows the chain connecting the elevating-screws. Fig. 7 is a side elevation'of a furnace in which our improved ore-roast-ing hearth may be used. Fig.

3o 8 is a front end eievation of the same. Fig. 9

is a longitudinal vertical sectional view showingr the position. of the ore-master in the furnace. Fig. 10 is a cross-sectional view taken approximately on the line a. a of Fig. 9.

Referring by numerals to the accompanying drawings, l indicates a bed-plate'rigidly held in position by means of bolts 2. Carried at suitable intervals upon each side of the plate 1 are a plurality of bearings 3, rotatably jour- 40 naled in which are rollers 4:. Jour'naled iny bearings 5 on the rear end'of the frame 1 is' an Operatingshaft 6, provided on one end with a -belt-'pulley Rigidly carried upon the said shaft between the bearingsv 5 'are a pluralityof levers or cams 8, there being a depression in the plate 1, allowing the said cams to turn with the shaft 6. Y y `Carried upon the rollers 4 is a frame 9, whie is ofsuch length that it projects at each end a 5o suitabled'istance beyond the ond rollers and isV provided at itsY rear end with the integral trans- Fig. 5 shows one otl the member 10. .with integral heads 24, which when the d everse member lmagainst wh ich the cams 8 operate. Jou rnaled in bearings 1 1 on each sideof the frame Q is a shaft12, each of which is provided with worm-screws '13. The said screws .55 13 operate upon worin-wheels 14, through each of which is threaded a screw 15, tiattened at their upper ends 1b'. These-id flattened portion of Iche screws projects into squared aper tures 17 in the bottoml 18 of the table. This o is forthe purpose of preventing,y the said screws from turning,V when the shafts 12 are turned, but allowing them to be raisedhy the wormwlieels 14., thereby 'elevating the table. TheY rear end of each of the shafts 12 carries a 65 sprocket-wheel 19, around which passes the chain.20. One of the said shaftscarries a handwheel 1 on its forward'end for the'purpose ot' rotating the said shaft when it is desired to raise or lower the table. The screws 7a 15 heii'igat. different distances from the pi volpoint of thetirble necessitateth'atthe screws at the'rearot' the table have threads of greater pitch than those nearerihe pivotinorderthat `they may be raised more rapidly and abut 15 against the bottom ot' the table at all times. In other respects the arrangement of the screws is the same.

Supported on the 'rear end'ot' the plate' 1 is a bracket 22, carried by which and by the 8o member 10 areaplurality of bolts23a, around which are carried expansive coil-springs 23, their ends restiur against the bracket 22 and The said bolts are provided vice is not in use-rest against the bracket The table ,whiehwe employ comprises the bottom 18 and the sloping top 25, the rear end of which is higher than the front, the iiont end .being pivolally secured tothe upwardly# oo projecting arms 26 integral with the fragile-9'. i

Carried-upon the top `2.5i is a box or receptacle '27,'within whichiis carried a suitable bottom orbase 28. Upon the base 28, within the re.-

ceptacle 27, are plaeedapiurality of sections .29 kof'corrugated tire-clay.

The arrangement ofv the part-s just described and the vcorrugations Ot' the lire-clay are' best shown in Fig. 3.

The improvedorelroasting hearth may be used in furnaces of any desired construction, roo' but is especially adapted for use in a furnace constructed as 'shown in Figs. 7 to 10, in-

clusve. in a furnace of this construction the ore-roaster is secured rigidly upon a suitable foundation 30, the shaft 6 projecting through, and the pulley 7 being located exie'riorly of, the furnace-walls, as shown in Fig. 8. The fire-boxl is located a suitable distance in front of the. ore-roaster and its foundation and is separated therefrom by a discharge-pit 32, into which the ore falls after it has been sufficiently roasted. The heat and productsqf con'bustion from the lire-box are drawn rearwardly over the furnace and pass out through the 4smoke-stach 33. The ore is placed upon the ore-roaster ihrou gh hoppers 34, located on the lop of the furnace, and after being roasted is removed from the discharge-pit through a suitable door provided for that purpose. 36 denotes an arch or covering extending over the springs 23, the function thereof being to shield the said springs from th'e heat, "thereby preserving their full power. Doors are provided at suitable intervals and afford a ready means for inspecting springs and the other mechanism at any time. To the rear of the oreroaster ane dust-chambers 38, access vto which is had through doors 39.

When it is desired to use the ore-roaster, a driving-belt is then applied to the belt-pulley 7, rotating the same, together with the shaft '6 andthecams or levers 8 carried thereby.

y This operation throws the ends of the levers or cams against the member 10` twice during each revolution. This pushes the frame 9 land all the parts carried thereby rearwardly until the cams have passed out of contact with the member 10. When the cams have passed beyond contact with the said member l0, the springs 23, having been compressed, expand to their normal position and throw the frame 9 forwardly, together with all the parts carried thereby, and the said forward movement is suddenly stopped with a jerk by 'the bo t-heads 24 coming against the bracket 22. T is operation is continued twice during each revolution of the cams and, as may be readily understood, the ore upon the c orrugated fire-clay would be rolled over and over by the con tinued'reciprocating and jerking movement.

An ore-roasting hearth of our improved construction presents many advantages over all others, is simple, and easily operated.

It may readily be seen that the cost involved yin theconstruction of a device as herein described would not necessarily be greater than for those of ordinary construction.

We claim- Y 1. In an ore-roasting hearth, a plate, rollers carried by said plate, a frame mounted on said rollers, a table having an inclined top pivoted to said frame, la shaftsupported-by -the said plate, means carried by said shaft for moving the said frame and table rearwardly when the said shaft is operated, and

means for reciprocating said frame and tableendwise, substantially as specified.

3. In an ore-roaster, a plate, a plurality of rollers carried by said plate, a frame mount'- ed upon said rollers, a table carried by said frame and being ypivoted at one end thereto, means carried by said plate for moving said frame rearwardly, a separate means for moving the table forwardly, and means for raising and lowering the free end of said table, substantially as specified.

4i In an ore-roasting hearth, a frame, a table carried by said frame, means for raising and lowering the rear end of said table, a receptacle upon said table, and sections of corrugated fire-clay removably carried within said receptacle, substantially as specified.

v4In testimony whereof we affix our signa'- tures inthe presence of witnesses.

GEORGE CLARY. 4 G. W. GARRISON. Witnesses tosignature of George Clary:

GEORGE TEW, A. B. WHIPPLE. Witnesses to signature f G. W. Garrison:

S. C. LITTLE, T. F. Do'rY.

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